elinks/src/ecmascript/spidermonkey/form.c

/* The SpiderMonkey window object implementation. */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "elinks.h"

#include "ecmascript/spidermonkey/util.h"

#include "bfu/dialog.h"
#include "cache/cache.h"
#include "cookies/cookies.h"
#include "dialogs/menu.h"
#include "dialogs/status.h"
#include "document/html/frames.h"
#include "document/document.h"
#include "document/forms.h"
#include "document/view.h"
#include "ecmascript/ecmascript.h"
#include "ecmascript/spidermonkey/form.h"
#include "intl/gettext/libintl.h"
#include "main/select.h"
#include "osdep/newwin.h"
#include "osdep/sysname.h"
#include "protocol/http/http.h"
#include "protocol/uri.h"
#include "session/history.h"
#include "session/location.h"
#include "session/session.h"
#include "session/task.h"
#include "terminal/tab.h"
#include "terminal/terminal.h"
#include "util/conv.h"
#include "util/memory.h"
#include "util/string.h"
#include "viewer/text/draw.h"
#include "viewer/text/form.h"
#include "viewer/text/link.h"
#include "viewer/text/vs.h"


/* Accordingly to the JS specs, each input type should own object. That'd be a
 * huge PITA though, however DOM comes to the rescue and defines just a single
 * HTMLInputElement. The difference could be spotted only by some clever tricky
 * JS code, but I hope it doesn't matter anywhere. --pasky */

static JSBool input_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);
static JSBool input_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

static const JSClass input_class = {
	"input", /* here, we unleash ourselves */
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	input_get_property, input_set_property,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

enum input_prop {
	JSP_INPUT_ACCESSKEY,
	JSP_INPUT_ALT,
	JSP_INPUT_CHECKED,
	JSP_INPUT_DEFAULT_CHECKED,
	JSP_INPUT_DEFAULT_VALUE,
	JSP_INPUT_DISABLED,
	JSP_INPUT_FORM,
	JSP_INPUT_MAX_LENGTH,
	JSP_INPUT_NAME,
	JSP_INPUT_READONLY,
	JSP_INPUT_SIZE,
	JSP_INPUT_SRC,
	JSP_INPUT_TABINDEX,
	JSP_INPUT_TYPE,
	JSP_INPUT_VALUE
};

/* XXX: Some of those are marked readonly just because we can't change them
 * safely now. Changing default* values would affect all open instances of the
 * document, leading to a potential security risk. Changing size and type would
 * require re-rendering the document (TODO), tabindex would require renumbering
 * of all links and whatnot. --pasky */
static const JSPropertySpec input_props[] = {
	{ "accessKey",	JSP_INPUT_ACCESSKEY,	JSPROP_ENUMERATE },
	{ "alt",	JSP_INPUT_ALT,		JSPROP_ENUMERATE },
	{ "checked",	JSP_INPUT_CHECKED,	JSPROP_ENUMERATE },
	{ "defaultChecked",JSP_INPUT_DEFAULT_CHECKED,JSPROP_ENUMERATE },
	{ "defaultValue",JSP_INPUT_DEFAULT_VALUE,JSPROP_ENUMERATE },
	{ "disabled",	JSP_INPUT_DISABLED,	JSPROP_ENUMERATE },
	{ "form",	JSP_INPUT_FORM,		JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "maxLength",	JSP_INPUT_MAX_LENGTH,	JSPROP_ENUMERATE },
	{ "name",	JSP_INPUT_NAME,		JSPROP_ENUMERATE },
	{ "readonly",	JSP_INPUT_READONLY,	JSPROP_ENUMERATE },
	{ "size",	JSP_INPUT_SIZE,		JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "src",	JSP_INPUT_SRC,		JSPROP_ENUMERATE },
	{ "tabindex",	JSP_INPUT_TABINDEX,	JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "type",	JSP_INPUT_TYPE,		JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "value",	JSP_INPUT_VALUE,	JSPROP_ENUMERATE },
	{ NULL }
};

static JSBool input_blur(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool input_click(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool input_focus(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool input_select(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

static const JSFunctionSpec input_funcs[] = {
	{ "blur",	input_blur,	0 },
	{ "click",	input_click,	0 },
	{ "focus",	input_focus,	0 },
	{ "select",	input_select,	0 },
	{ NULL }
};

static JSBool
input_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_state *fs = JS_GetPrivate(ctx, obj);
	struct form_control *fc = find_form_control(document, fs);
	int linknum;
	struct link *link = NULL;

	assert(fc);
	assert(fc->form && fs);

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	linknum = get_form_control_link(document, fc);
	/* Hiddens have no link. */
	if (linknum >= 0) link = &document->links[linknum];

	undef_to_jsval(ctx, vp);

	switch (JSVAL_TO_INT(id)) {
	case JSP_INPUT_ACCESSKEY:
	{
		struct string keystr;

		if (!link) break;

		init_string(&keystr);
		add_accesskey_to_string(&keystr, link->accesskey);
		string_to_jsval(ctx, vp, keystr.source);
		done_string(&keystr);
		break;
	}
	case JSP_INPUT_ALT:
		string_to_jsval(ctx, vp, fc->alt);
		break;
	case JSP_INPUT_CHECKED:
		boolean_to_jsval(ctx, vp, fs->state);
		break;
	case JSP_INPUT_DEFAULT_CHECKED:
		boolean_to_jsval(ctx, vp, fc->default_state);
		break;
	case JSP_INPUT_DEFAULT_VALUE:
		string_to_jsval(ctx, vp, fc->default_value);
		break;
	case JSP_INPUT_DISABLED:
		/* FIXME: <input readonly disabled> --pasky */
		boolean_to_jsval(ctx, vp, fc->mode == FORM_MODE_DISABLED);
		break;
	case JSP_INPUT_FORM:
		object_to_jsval(ctx, vp, parent_form);
		break;
	case JSP_INPUT_MAX_LENGTH:
		int_to_jsval(ctx, vp, fc->maxlength);
		break;
	case JSP_INPUT_NAME:
		string_to_jsval(ctx, vp, fc->name);
		break;
	case JSP_INPUT_READONLY:
		/* FIXME: <input readonly disabled> --pasky */
		boolean_to_jsval(ctx, vp, fc->mode == FORM_MODE_READONLY);
		break;
	case JSP_INPUT_SIZE:
		int_to_jsval(ctx, vp, fc->size);
		break;
	case JSP_INPUT_SRC:
		if (link && link->where_img)
			string_to_jsval(ctx, vp, link->where_img);
		break;
	case JSP_INPUT_TABINDEX:
		if (link)
			/* FIXME: This is WRONG. --pasky */
			int_to_jsval(ctx, vp, link->number);
		break;
	case JSP_INPUT_TYPE:
	{
		unsigned char *s = NULL;

		switch (fc->type) {
		case FC_TEXT: s = "text"; break;
		case FC_PASSWORD: s = "password"; break;
		case FC_FILE: s = "file"; break;
		case FC_CHECKBOX: s = "checkbox"; break;
		case FC_RADIO: s = "radio"; break;
		case FC_SUBMIT: s = "submit"; break;
		case FC_IMAGE: s = "image"; break;
		case FC_RESET: s = "reset"; break;
		case FC_BUTTON: s = "button"; break;
		case FC_HIDDEN: s = "hidden"; break;
		default: INTERNAL("input_get_property() upon a non-input item."); break;
		}
		string_to_jsval(ctx, vp, s);
		break;
	}
	case JSP_INPUT_VALUE:
		string_to_jsval(ctx, vp, fs->value);
		break;

	default:
		INTERNAL("Invalid ID %d in input_get_property().", JSVAL_TO_INT(id));
		break;
	}

	return JS_TRUE;
}

static JSBool
input_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_state *fs = JS_GetPrivate(ctx, obj);
	struct form_control *fc = find_form_control(document, fs);
	int linknum;
	struct link *link = NULL;

	assert(fc);
	assert(fc->form && fs);

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	linknum = get_form_control_link(document, fc);
	/* Hiddens have no link. */
	if (linknum >= 0) link = &document->links[linknum];

	switch (JSVAL_TO_INT(id)) {
	case JSP_INPUT_ACCESSKEY:
		if (link)
			link->accesskey = accesskey_string_to_unicode(jsval_to_string(ctx, vp));
		break;
	case JSP_INPUT_ALT:
		mem_free_set(&fc->alt, stracpy(jsval_to_string(ctx, vp)));
		break;
	case JSP_INPUT_CHECKED:
		if (fc->type != FC_CHECKBOX && fc->type != FC_RADIO)
			break;
		fs->state = jsval_to_boolean(ctx, vp);
		break;
	case JSP_INPUT_DISABLED:
		/* FIXME: <input readonly disabled> --pasky */
		fc->mode = (jsval_to_boolean(ctx, vp) ? FORM_MODE_DISABLED
		                      : fc->mode == FORM_MODE_READONLY ? FORM_MODE_READONLY
		                                                       : FORM_MODE_NORMAL);
		break;
	case JSP_INPUT_MAX_LENGTH:
		fc->maxlength = atol(jsval_to_string(ctx, vp));
		break;
	case JSP_INPUT_NAME:
		mem_free_set(&fc->name, stracpy(jsval_to_string(ctx, vp)));
		break;
	case JSP_INPUT_READONLY:
		/* FIXME: <input readonly disabled> --pasky */
		fc->mode = (jsval_to_boolean(ctx, vp) ? FORM_MODE_READONLY
		                      : fc->mode == FORM_MODE_DISABLED ? FORM_MODE_DISABLED
		                                                       : FORM_MODE_NORMAL);
		break;
	case JSP_INPUT_SRC:
		if (link) {
			mem_free_set(&link->where_img, stracpy(jsval_to_string(ctx, vp)));
		}
		break;
	case JSP_INPUT_VALUE:
		if (fc->type == FC_FILE)
			break; /* A huge security risk otherwise. */
		mem_free_set(&fs->value, stracpy(jsval_to_string(ctx, vp)));
		if (fc->type == FC_TEXT || fc->type == FC_PASSWORD)
			fs->state = strlen(fs->value);
		break;

	default:
		INTERNAL("Invalid ID %d in input_set_property().", JSVAL_TO_INT(id));
		return JS_TRUE;
	}

	return JS_TRUE;
}

static JSBool
input_blur(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	/* We are a text-mode browser and there *always* has to be something
	 * selected.  So we do nothing for now. (That was easy.) */
	return JS_TRUE;
}

static JSBool
input_click(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct session *ses = doc_view->session;
	struct form_state *fs = JS_GetPrivate(ctx, obj);
	struct form_control *fc;
	int linknum;

	assert(fs);
	fc = find_form_control(document, fs);
	assert(fc);

	linknum = get_form_control_link(document, fc);
	/* Hiddens have no link. */
	if (linknum < 0)
		return JS_TRUE;

	/* Restore old current_link afterwards? */
	jump_to_link_number(ses, doc_view, linknum);
	if (enter(ses, doc_view, 0) == FRAME_EVENT_REFRESH)
		refresh_view(ses, doc_view, 0);
	else
		print_screen_status(ses);

	boolean_to_jsval(ctx, rval, 0);
	return JS_TRUE;
}

static JSBool
input_focus(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct session *ses = doc_view->session;
	struct form_state *fs = JS_GetPrivate(ctx, obj);
	struct form_control *fc;
	int linknum;

	assert(fs);
	fc = find_form_control(document, fs);
	assert(fc);

	linknum = get_form_control_link(document, fc);
	/* Hiddens have no link. */
	if (linknum < 0)
		return JS_TRUE;

	jump_to_link_number(ses, doc_view, linknum);

	boolean_to_jsval(ctx, rval, 0);
	return JS_TRUE;
}

static JSBool
input_select(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	/* We support no text selecting yet.  So we do nothing for now.
	 * (That was easy, too.) */
	return JS_TRUE;
}

static JSObject *
get_input_object(JSContext *ctx, JSObject *jsform, struct form_state *fs)
{
	if (!fs->ecmascript_obj) {
		/* jsform ('form') is input's parent */
		/* FIXME: That is NOT correct since the real containing element
		 * should be its parent, but gimme DOM first. --pasky */
		JSObject *jsinput = JS_NewObject(ctx, (JSClass *) &input_class, NULL, jsform);

		JS_DefineProperties(ctx, jsinput, (JSPropertySpec *) input_props);
		JS_DefineFunctions(ctx, jsinput, (JSFunctionSpec *) input_funcs);
		JS_SetPrivate(ctx, jsinput, fs);
		fs->ecmascript_obj = jsinput;
	}
	return fs->ecmascript_obj;
}


static JSObject *
get_form_control_object(JSContext *ctx, JSObject *jsform, enum form_type type, struct form_state *fs)
{
	switch (type) {
		case FC_TEXT:
		case FC_PASSWORD:
		case FC_FILE:
		case FC_CHECKBOX:
		case FC_RADIO:
		case FC_SUBMIT:
		case FC_IMAGE:
		case FC_RESET:
		case FC_BUTTON:
		case FC_HIDDEN:
			return get_input_object(ctx, jsform, fs);

		case FC_TEXTAREA:
		case FC_SELECT:
			/* TODO */
			return NULL;

		default:
			INTERNAL("Weird fc->type %d", type);
			return NULL;
	}
}



static JSBool form_elements_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

static const JSClass form_elements_class = {
	"elements",
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	form_elements_get_property, JS_PropertyStub,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

static JSBool form_elements_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool form_elements_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

static const JSFunctionSpec form_elements_funcs[] = {
	{ "item",		form_elements_item,		1 },
	{ "namedItem",		form_elements_namedItem,	1 },
	{ NULL }
};

/* INTs from 0 up are equivalent to item(INT), so we have to stuff length out
 * of the way. */
enum form_elements_prop { JSP_FORM_ELEMENTS_LENGTH = -1 };
static const JSPropertySpec form_elements_props[] = {
	{ "length",	JSP_FORM_ELEMENTS_LENGTH,	JSPROP_ENUMERATE | JSPROP_READONLY},
	{ NULL }
};

static JSBool
form_elements_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);

	if (JSVAL_IS_STRING(id)) {
		form_elements_namedItem(ctx, obj, 1, &id, vp);
		return JS_TRUE;
	}

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	undef_to_jsval(ctx, vp);

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ELEMENTS_LENGTH:
		int_to_jsval(ctx, vp, list_size(&form->items));
		break;
	default:
		/* Array index. */
		form_elements_item(ctx, obj, 1, &id, vp);
		break;
	}

	return JS_TRUE;
}

static JSBool
form_elements_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);
	struct form_control *fc;
	int counter = -1;
	int index;

	if (argc != 1)
		return JS_TRUE;

	index = atol(jsval_to_string(ctx, &argv[0]));

	undef_to_jsval(ctx, rval);

	foreach (fc, form->items) {
		counter++;
		if (counter == index) {
			JSObject *fcobj = get_form_control_object(ctx, parent_form, fc->type, find_form_state(doc_view, fc));

			if (fcobj) {
				object_to_jsval(ctx, rval, fcobj);
			}
			break;
		}
	}

	return JS_TRUE;
}

static JSBool
form_elements_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_form = JS_GetParent(ctx, obj);
	JSObject *parent_doc = JS_GetParent(ctx, parent_form);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form_view *form_view = JS_GetPrivate(ctx, parent_form);
	struct form *form = find_form_by_form_view(document, form_view);
	struct form_control *fc;
	unsigned char *string;

	if (argc != 1)
		return JS_TRUE;

	string = jsval_to_string(ctx, &argv[0]);
	if (!*string)
		return JS_TRUE;

	undef_to_jsval(ctx, rval);

	foreach (fc, form->items) {
		if (fc->name && !strcasecmp(string, fc->name)) {
			JSObject *fcobj = get_form_control_object(ctx, parent_form, fc->type, find_form_state(doc_view, fc));

			if (fcobj) {
				object_to_jsval(ctx, rval, fcobj);
			}
			break;
		}
	}

	return JS_TRUE;
}



static JSBool form_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);
static JSBool form_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

static const JSClass form_class = {
	"form",
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	form_get_property, form_set_property,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

enum form_prop {
	JSP_FORM_ACTION,
	JSP_FORM_ELEMENTS,
	JSP_FORM_ENCODING,
	JSP_FORM_LENGTH,
	JSP_FORM_METHOD,
	JSP_FORM_NAME,
	JSP_FORM_TARGET
};

static const JSPropertySpec form_props[] = {
	{ "action",	JSP_FORM_ACTION,	JSPROP_ENUMERATE },
	{ "elements",	JSP_FORM_ELEMENTS,	JSPROP_ENUMERATE },
	{ "encoding",	JSP_FORM_ENCODING,	JSPROP_ENUMERATE },
	{ "length",	JSP_FORM_LENGTH,	JSPROP_ENUMERATE | JSPROP_READONLY },
	{ "method",	JSP_FORM_METHOD,	JSPROP_ENUMERATE },
	{ "name",	JSP_FORM_NAME,		JSPROP_ENUMERATE },
	{ "target",	JSP_FORM_TARGET,	JSPROP_ENUMERATE },
	{ NULL }
};

static JSBool form_reset(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool form_submit(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

static const JSFunctionSpec form_funcs[] = {
	{ "reset",	form_reset,	0 },
	{ "submit",	form_submit,	0 },
	{ NULL }
};

static JSBool
form_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	/* DBG("doc %p %s\n", parent_doc, JS_GetStringBytes(JS_ValueToString(ctx, OBJECT_TO_JSVAL(parent_doc)))); */
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);

	assert(form);

	if (JSVAL_IS_STRING(id)) {
		struct form_control *fc;
		unsigned char *string;

		string = jsval_to_string(ctx, &id);
		foreach (fc, form->items) {
			JSObject *fcobj = NULL;

			if (!fc->name || strcasecmp(string, fc->name))
				continue;

			fcobj = get_form_control_object(ctx, obj, fc->type, find_form_state(doc_view, fc));
			if (fcobj) {
				object_to_jsval(ctx, vp, fcobj);
			} else {
				undef_to_jsval(ctx, vp);
			}
			break;
		}
		return JS_TRUE;
	}

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	undef_to_jsval(ctx, vp);

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ACTION:
		string_to_jsval(ctx, vp, form->action);
		break;

	case JSP_FORM_ELEMENTS:
	{
		/* jsform ('form') is form_elements' parent; who knows is that's correct */
		JSObject *jsform_elems = JS_NewObject(ctx, (JSClass *) &form_elements_class, NULL, obj);

		JS_DefineProperties(ctx, jsform_elems, (JSPropertySpec *) form_elements_props);
		JS_DefineFunctions(ctx, jsform_elems, (JSFunctionSpec *) form_elements_funcs);
		object_to_jsval(ctx, vp, jsform_elems);
		/* SM will cache this property value for us so we create this
		 * just once per form. */
	}
		break;

	case JSP_FORM_ENCODING:
		switch (form->method) {
		case FORM_METHOD_GET:
		case FORM_METHOD_POST:
			string_to_jsval(ctx, vp, "application/x-www-form-urlencoded");
			break;
		case FORM_METHOD_POST_MP:
			string_to_jsval(ctx, vp, "multipart/form-data");
			break;
		case FORM_METHOD_POST_TEXT_PLAIN:
			string_to_jsval(ctx, vp, "text/plain");
			break;
		}
		break;

	case JSP_FORM_LENGTH:
		int_to_jsval(ctx, vp, list_size(&form->items));
		break;

	case JSP_FORM_METHOD:
		switch (form->method) {
		case FORM_METHOD_GET:
			string_to_jsval(ctx, vp, "GET");
			break;

		case FORM_METHOD_POST:
		case FORM_METHOD_POST_MP:
		case FORM_METHOD_POST_TEXT_PLAIN:
			string_to_jsval(ctx, vp, "POST");
			break;
		}
		break;

	case JSP_FORM_NAME:
		string_to_jsval(ctx, vp, form->name);
		break;

	case JSP_FORM_TARGET:
		string_to_jsval(ctx, vp, form->target);
		break;

	default:
		INTERNAL("Invalid ID %d in form_get_property().", JSVAL_TO_INT(id));
		break;
	}

	return JS_TRUE;
}

static JSBool
form_set_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);
	unsigned char *string;

	assert(form);

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORM_ACTION:
		mem_free_set(&form->action, stracpy(jsval_to_string(ctx, vp)));
		break;

	case JSP_FORM_ENCODING:
		string = jsval_to_string(ctx, vp);
		if (!strcasecmp(string, "application/x-www-form-urlencoded")) {
			form->method = form->method == FORM_METHOD_GET ? FORM_METHOD_GET
			                                               : FORM_METHOD_POST;
		} else if (!strcasecmp(string, "multipart/form-data")) {
			form->method = FORM_METHOD_POST_MP;
		} else if (!strcasecmp(string, "text/plain")) {
			form->method = FORM_METHOD_POST_TEXT_PLAIN;
		}
		break;

	case JSP_FORM_METHOD:
		string = jsval_to_string(ctx, vp);
		if (!strcasecmp(string, "GET")) {
			form->method = FORM_METHOD_GET;
		} else if (!strcasecmp(string, "POST")) {
			form->method = FORM_METHOD_POST;
		}
		break;

	case JSP_FORM_NAME:
		mem_free_set(&form->name, stracpy(jsval_to_string(ctx, vp)));
		break;

	case JSP_FORM_TARGET:
		mem_free_set(&form->target, stracpy(jsval_to_string(ctx, vp)));
		break;

	default:
		INTERNAL("Invalid ID %d in form_set_property().", JSVAL_TO_INT(id));
		break;
	}

	return JS_TRUE;
}

static JSBool
form_reset(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);

	assert(form);

	do_reset_form(doc_view, form);
	draw_forms(doc_view->session->tab->term, doc_view);

	boolean_to_jsval(ctx, rval, 0);

	return JS_TRUE;
}

static JSBool
form_submit(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct session *ses = doc_view->session;
	struct form_view *fv = JS_GetPrivate(ctx, obj);
	struct form *form = find_form_by_form_view(doc_view->document, fv);

	assert(form);
	submit_given_form(ses, doc_view, form);

	boolean_to_jsval(ctx, rval, 0);

	return JS_TRUE;
}

JSObject *
get_form_object(JSContext *ctx, JSObject *jsdoc, struct form_view *fv)
{
	if (!fv->ecmascript_obj) {
		/* jsdoc ('document') is fv's parent */
		/* FIXME: That is NOT correct since the real containing element
		 * should be its parent, but gimme DOM first. --pasky */
		JSObject *jsform = JS_NewObject(ctx, (JSClass *) &form_class, NULL, jsdoc);

		JS_DefineProperties(ctx, jsform, (JSPropertySpec *) form_props);
		JS_DefineFunctions(ctx, jsform, (JSFunctionSpec *) form_funcs);
		JS_SetPrivate(ctx, jsform, fv);
		fv->ecmascript_obj = jsform;
	}
	return fv->ecmascript_obj;
}


static JSBool forms_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp);

const JSClass forms_class = {
	"forms",
	JSCLASS_HAS_PRIVATE,
	JS_PropertyStub, JS_PropertyStub,
	forms_get_property, JS_PropertyStub,
	JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub
};

static JSBool forms_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
static JSBool forms_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);

const JSFunctionSpec forms_funcs[] = {
	{ "item",		forms_item,		1 },
	{ "namedItem",		forms_namedItem,	1 },
	{ NULL }
};

/* INTs from 0 up are equivalent to item(INT), so we have to stuff length out
 * of the way. */
enum forms_prop { JSP_FORMS_LENGTH = -1 };
const JSPropertySpec forms_props[] = {
	{ "length",	JSP_FORMS_LENGTH,	JSPROP_ENUMERATE | JSPROP_READONLY},
	{ NULL }
};

static JSBool
forms_get_property(JSContext *ctx, JSObject *obj, jsval id, jsval *vp)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;

	if (JSVAL_IS_STRING(id)) {
		forms_namedItem(ctx, obj, 1, &id, vp);
		return JS_TRUE;
	}

	if (!JSVAL_IS_INT(id))
		return JS_TRUE;

	switch (JSVAL_TO_INT(id)) {
	case JSP_FORMS_LENGTH:
		int_to_jsval(ctx, vp, list_size(&document->forms));
		break;
	default:
		/* Array index. */
		forms_item(ctx, obj, 1, &id, vp);
		break;
	}

	return JS_TRUE;
}

static JSBool
forms_item(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct form_view *fv;
	int counter = -1;
	int index;

	if (argc != 1)
		return JS_TRUE;

	index = atol(jsval_to_string(ctx, &argv[0]));

	undef_to_jsval(ctx, rval);

	foreach (fv, vs->forms) {
		counter++;
		if (counter == index) {
			object_to_jsval(ctx, rval, get_form_object(ctx, parent_doc, fv));
			break;
		}
	}

	return JS_TRUE;
}

static JSBool
forms_namedItem(JSContext *ctx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
	JSObject *parent_doc = JS_GetParent(ctx, obj);
	JSObject *parent_win = JS_GetParent(ctx, parent_doc);
	struct view_state *vs = JS_GetPrivate(ctx, parent_win);
	struct document_view *doc_view = vs->doc_view;
	struct document *document = doc_view->document;
	struct form *form;
	unsigned char *string;

	if (argc != 1)
		return JS_TRUE;

	undef_to_jsval(ctx, rval);

	string = jsval_to_string(ctx, &argv[0]);
	if (!*string)
		return JS_TRUE;

	foreach (form, document->forms) {
		if (form->name && !strcasecmp(string, form->name)) {
			object_to_jsval(ctx, rval, get_form_object(ctx, parent_doc,
					find_form_view(doc_view, form)));
			break;
		}
	}

	return JS_TRUE;
}